// set variables
	var ie = navigator.appName == "Microsoft Internet Explorer";
	var op = navigator.userAgent.indexOf('Opera') != -1;
	var ns6 = navigator.appName == "Netscape" && navigator.appVersion.substring(0,1) > "4";
	var timer = null;

// open menu x
	function OpenMenu (x) {
		if (ie)  {
			showmenu = eval ("document.getElementById('submenue" +x+"');");
			showmenu.style.visibility = "visible";

			var menus = 3;
			for (i = 0; i < menus; i++) {
				currentmenu = eval ("document.getElementById('submenue" +i+"');");
				if ((currentmenu.style.visibility == "visible") && (currentmenu != showmenu))  {
					currentmenu.style.visibility = "hidden";
				}
			}
		}

		if (ns6 || op) {
			showmenu = eval ("document.getElementById('submenue" +x+"');");
			showmenu.style.visibility = "visible";

			var menus = 3;
			for (i = 0; i < menus; i++) {
				currentmenu=document.getElementById ("submenue"+i);
				if ((currentmenu.style.visibility = "visible") && (currentmenu != showmenu))  {
					 currentmenu.style.visibility = "hidden";
				}
      			}
		}
	}

// hide all menus
	function Close()   {
        		var menus = 3;
		for (i = 0; i < menus; i++) {
               		if (ie) {
               			eval ("document.getElementById('submenue" +i + "').style.visibility = 'hidden';");
               		}
                		if (ns6 || op) {
            			eval ("document.getElementById('submenue" +i + "').style.visibility = 'hidden';");
                		}
        		}    		
	}